Among his series of nearly 20 tweets, Tyson griped that the Alfonso Cuaron-directed movie -- which stars SandraBullock and GeorgeClooney -- should be renamed Zero Gravity or AngularMomentum, the latter of which he helpfully explained as "the tendency, once set rotating, to keep rotating, unless another force acts to slow or stop it."

He also questioned "why anyone is impressed with a zero-G film 45 years after being impressed with 2001: A Space Odyssey" and criticized the fact that Bullock's hair did not "float freely on her head" during zero gravity scenes. He also helpfully suggested simple at-home experiments for his Twitter followers that would demonstrate the errors in Gravity's science.